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Answer
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Article
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| What are dermatophytes also known as?
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- Fungi Imperfecti
- Phaeohyphomycetes
- (Commonly called 'ringworm' in practice)
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Link to Answer Article
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| Which two species of dermatophytes are of particular veterinary interest?
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| Why are dermatophytes usually found in the subcutaneous and cutaneous tissue?
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- Lack of tolerance to body temperature and antifungal activity in serum and body fluids
- Are able to penetrate all layers of skin however
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| What clincial signs are usually present with a dermatophyte infection?
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- Epidermal hyperplasia and inflammation leading to peripheral red 'ringworm'
- Superficial perivascular dermatitis leading to intracorneal microabscesses
- furunculosis
- Pustules in hair follicles cause by secondary invaders leading to alopecia
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| How would you diagnose a dermatophyte infection?
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- Clinical sings
- Wood's Lamp
- Examine in 10-20% KOH for the presence of hyphae or arthrospores with Lactophenol Cotton Blue to enhance visualisation
- Sabouraud's Dextrose agar containing cyclohexamide and chloramphenicol at room temperature for a month for culture
- Culture with Dermatophyte Test Medium (Saubouraud's Dextrose agar with phenol red indicator- medium changes from yellow to red if fungi present)
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Link to Answer Article
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| How are dermatophytes infections treated?
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- Isolation
- Griseofulvin
- Whitfield's ointment (Salicylic and benzoic acid)
- Aqueous lime sulphur topically for dogs
- Iodine
- Antibiotics
- Natamycin antifungal
- Imidiazole derivatives
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